I bought a generic batteryless passthrough but it was poorly designed and had no cord kink protector on the end. The insulation split in a week. I patched it with silicone and it held out for another few weeks but it died today. The only one I've seen so far that actually seems to have a kink protector on it is on madvapes called a sit up and go, but they are out of stock. Does anyone else carry these things?